Fragment angular correlation in the breakup of 16O ions at 95 MeV/A |
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| Affiliation: | 1. Fraunhofer Ernst-Mach-Institute for High-Speed Dynamics, Eckerstrasse 4, 79104 Freiburg, Germany;1. Chair of Remote Sensing and Landscape Information Systems, University of Freiburg, 79106 Freiburg, Germany;2. Chair of Forest Growth and Dendroecology, University of Freiburg, 79106 Freiburg, Germany;3. Chair of Wildlife Ecology and Management, University of Freiburg, 79106 Freiburg, Germany;4. Chair of Forestry Economics and Forest Planning, University of Freiburg, 79106 Freiburg, Germany |
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| Abstract: | Fragment angular correlations in projectile breakup reactions are very sensitive to interference between different multipolarities entering in the excitation-dissociation process of the projectile. In particular, it was proposed to disentangle L = 1 and L = 2 contributions in direct breakup reactions of 16O with low relative energy between the α and 12C fragment, which are of astrophysical interest. We studied the experimental aspects of extracting those angular correlations in extreme kinematical conditions usually encountered in breakup experiments of astrophysical interest. The breakup of 95 MeV/A 16O projectiles induced by a 208Pb target was measured using the high-resolution spectrometer SPEG at Ganil for the coincident detection of the fragments. Sequential breakup via the 12.53 MeV level of 16O is analyzed in this framework and it favors an one-step M2 excitation of this level. |
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